Sept. 8, 2003 | SISTERS, Ore. -- The helicopters were indeed black, and when they came thwocking through the clear blue skies above Redmond, Ore., on the afternoon of Aug. 19, Don Berry happened to be having a slow day selling campers and fifth wheels at Courtesy RV. "We just stood there in the lot, my friend Chuck and me, watching," he says before launching into a bit of detail that government sources will not confirm. "They were Chinook military helicopters -- huge things with round noses. There were three of them, and they were moving in tight formation, lollygagging...